Datasheet

1.888.KEITHLEY (U.S. only)
www.keithley.com
23
SWITCHING AND CONTROL
A GREATER MEASURE OF CONFIDENCE
• 28 general purpose
Form C relays rated for 300V,
2A switched or 3A carry signal
capacity; 60W, 125VA
• 4 high current Form A relays
rated for 250VAC, 7A or 30VDC,
7A switched capacity; 210W
• Analog backplane connection
relays provided for user
interconnections
• Screw terminal connections
provided on removable 3740-ST
accessory
• Relay closures stored in
onboard memory
• Latching electromechanical
relays
The Model 3740 offers 28 general-purpose form C channels that are ideal for routing power or other
control devices. For higher power applications of up to 7A, four additional high current form A chan-
nels are provided.
If any general purpose signal requires routing to the Series 3700A mainframe backplane, terminal
blocks are located on the card, which are enabled with jumpers. Custom configurations can be
created with the user accessible terminal blocks. For additional protection, an onboard temperature
sensor will notify the mainframe when the card’s operating temperature exceeds 70°C, compromising
system specifications.
The Model 3740 uses two 50-pin male D-sub connectors for signal connections. For screw terminal
connections, use the detachable Model 3740-ST accessory.
Ordering Information
3740 General Purpose Card
with 32 Independent
Channels
ACCESSORIES AVAILABLE
3721-MTC-1.5 50 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
3721-MTC-3 50 Pin D-sub Female to Male Cable, 3m (10 ft.)
3740-ST Screw Terminal Block
3790-KIT50-R 50 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 100 solder cup
contacts)
3740
32-channel Isolated Switch Card
28 Form C relays and 4 high power Form A relays
SERVICES AVAILABLE
3740-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3740-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3740-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
32 channel isolated switch card 32 channel isolated switch card